Rapid
What is the best Category to improve the game ? Bullet, Blitz, Rapid or Daily ?
If you are interested in becoming a better chessplayer, the slower the time control the better. Improvement comes from understanding your mistakes and learning how to avoid them. Bullet and blitz do not give you time to think. While it may be fun, it is not the way to improve.

I am a beginner for me Bullet and blitz are great for quick decision making. if you want to play calmly then play rapid to not rush things think your move then then attack or defend that basically depends person to person nobody can judge that this particular game mode is the best its up to you to decide
Good luck!!!!
When it comes to improving at chess, players often wonder which time control helps the most. Should you train with Bullet and Blitz to sharpen quick decision-making, or focus on Rapid and Daily games that allow deeper calculation and strategy? In short, which category, Bullet, Blitz, Rapid, or Daily, truly helps you improve your overall game, especially if you are a beginner?